Which of the following is a subsystem of an organism? Please explain and I give you 5 stars. A. cell
B. organ system
C. tissue
D. all of the above


  like australopithecus afarensis; probably the direct ancestor of this group. africa: 5.8 to 4.4 million years ago. 

this is math not biology xd



In multicellular organisms, the body is a system of multiple, interacting subsystems. Subsystems are groups of cells that work together to form tissues. Interactions are limited to the circulatory, excretory, digestive, respiratory, muscular, and nervous systems.

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